Conveyor merge section, 1734 AENTR with 20 modules on it, mix of IB8 and OB8 and a couple of OE2V. 1756 L71, Studio v31.

The modules past about slot 8 or 9 fault and come back on their own. Yellow triangle for a few seconds then green. Worse when the section is running flat out with most of the outputs on. Slots 1 through 8 never fault. AENTR itself never faults, both link lights fine.

Tried: swapped the terminal base under slot 12 which faults the most, no change. Slowed the RPI from 10ms to 50ms on the far modules, no change. Tightened every base, checked the 24V at the AENTR, 24.1V steady.

Nothing changed on this rack that anybody knows of, been like this on and off for months and it's getting worse. Is the AENTR dying? It's the only thing in common with all the faulting modules.